Add Linux development station role with systemd services for code-server and OpenCode

- Implemented handlers for restarting code-server and OpenCode services.
- Created main tasks for setting up a Linux development station, including user management, package installation, and configuration.
- Added validation for OpenCode server credentials and code-server password.
- Introduced tool package management for npm, uv, and go installers.
- Developed templates for systemd service units for code-server and OpenCode.
- Included scripts for starting code-server and OpenCode with SSH agent support.
- Updated inventory and Terraform configuration to include new development host.

ansible/roles/linux_dev_station/templates/start-ide.sh.j2

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+{% if linux_dev_station_ssh_agent_enabled | bool %}
+source "{{ linux_dev_station_scripts_dir }}/ssh-agent-start.sh"
+{% endif %}
+
+cd {{ linux_dev_station_workspace_dir }}
+
+exec code-server \
+  --bind-addr {{ linux_dev_station_code_server_host }}:{{ linux_dev_station_code_server_port }} \
+  --auth {{ linux_dev_station_code_server_auth }} \
+  --disable-telemetry \
+  {{ linux_dev_station_code_server_workspace }}